Preparatory drawings are done in pencil or charcoal, usually from life, using the sightsize method. The paper used is either Roma, Fabriano, for charcoal or Arches, France, for pencil. Sometimes the preparatory drawing is transferred to the canvas or panel for painting.
The price for a drawing with minimum three sittings is USD $500. Drawings can be done from photos.
Below are some examples of a preparatory drawing turned into a painting.